Birkenstock Arizona Women's 2-Strap Sandals, Stone Birko-Flor, Cork Footbed (40 M EU - 9-9.5 US) Synthetic Birko-Flor upper in a casual slide sandal style with an open toe. Imported Arizona Women's 2-Strap Sandals, Stone Birko-Flor, Cork Footbed by Birkenstock (40 M EU - 9-9.5 US Women). Cork footbed molds to the individual shape of YOUR feet over time, providing an even support across the entire surface of your foot Twin adjustable buckled straps and flexible, shock absorbing EVA outsole. Please note: Birkenstock makes the Arizona Sandals intentionally roomy for added comfort so they tend to run large. Most people prefer it this way since the buckles can be adjusted for a tight fit. However, if you prefer a very tight fit AND do not plan on wearing socks: we recommend purchasing a size smaller than you typically purchase. For example, if you normally purchase a size 41 M and prefer a very tight fit, we recommend purchasing a size 40 M. 08/2016: Product update. **** Newly updated 2016 model (latest production); Arizona may now ship in newly updated Birkenstock shoe box (new blue design with handy size measuring guide printed on inside of shoe box). Sandals may now also come with black (not yellow) lettering (black printed logo and size information printed on footbed). ****